Process of improving the qualities of nickel-beryllium alloy



Patented Sept- 25,1928. r I 1,685,570

UNITED STATES PATENT OFFICE.

GEQRG MASING, OF BERLIN, AND OTTO DAHL-OIF BEBLIN-CHABLOTTHTBURG, GER

MANY, ASSIGNORS TO SIEMENS & HALSKE, AKTIENGESELLSCHAFT, OF SIEIENS- STADT, NEAR BERLIN, GERMANY. i I

PROCESS OF IMPROVINGTHE QUALITIES OE NICKEL-3153mm AL LOY. ilo Drawing. Application filed October 11, 1927, Serial No. 225,595, and in Germany September 18, 1828.

This invention'is based upon exhaustive These nickel beryllium alloys can have experiments which have shown that nickel other metals also added to them such for'exberyllium valloys containing a preponderating ample as aluminium, tin, iron, cobalt, copper, 65 I "amount of nickel can be manufactured and etcr In such case the amount of beryllium f ,5 f possess excellent technical properties particu- .contained'in the alloy is made less and yet an larly a high degree" of hardness. The manu-' improvement in the typical properties of the I "factureof the alloys maybe carried out for exnew alloys secured. When we speak of a ample by meltin togethernickel and berylnickel beryllium alloy in the specification and lium, or by thee ectrolysis'of molten masses cl We fer o an allo that may or may 10 such as a mixture for exa'mple'of beryllium "not contain one or more additional metals.

7 com unds with haloidsrof thealkali' or earth. What we claim as our invention and desire alka imetals using anickel cathode. Thus for to be secured by Letters Patent is I example it was found that an alloy contain- 1. The method for improving the qualities 05 ing-13.4% 'of berylliumis so hard that it of a nickel beryllium alloy which contains I j scratches glass. A similar behavior is exa preponderating amount of nickel and up to hibited by the nickel beryllium alloys con- 5%- beryllium, consisting in heating the al-fi I. ta-iningfrom 6 to 25% 'of'beryllium. I In 10y above a temperature of approximately {general the hardness of the alloys-increases 700 C. and after it has cooled heating the 7 with the amount of beryllium which they con-{alloy once more to a lower temperature. tain'. It. is,*however, possible to very con-' '2. The method for improving the qualities 1 siderably increase the hardness? of. alloys 'of a nickel beryllium alloy WhlChCOIltliIlS a I which are lower in beryllium. preponderatingamount of nickel and up to v Asan example let it be stated that alloys- 5%beryllium, consisting in heating the allo ".fcon'tainingi up to about 5% of'beryllium can to above 700 C. and after it has cooled, bebrou ght to more than doubletheir origiheating it at once to a temperature between nal hardness by quenching them in water or 300 and 600 C.

cooling them in air from a temperature in 3. A process for improving the qualities'ofthe neighborhood of orabove 700 C. and a nickel beryllium alloy which contains a L afterwards heating tempering) them to .a large proportion of nickel and up to about 1: lower temperature 0 about 300 to 600 (1. 5% ofberyllium, consisting in 'highly'heating 4 With a beryllium content of 2 for exthe alloy, quenching it from above a tempera-. 1 I am le, the hardness after quenching amounts 'ture of approximately 700 0., and thenreto less than 200 Brinell, after subsequent heating it toa temperature within the ap I heating, however, to about 500. proximate range of 300600 C. "T 1 i 3 The hardness can be still further increased 4. A method for improving the'yqualities I if the alloy be suitablyworked mechanically of nickel beryllium alloys which cont'aln'large I after quenching and prior to the second proportions ofn'ickel and up'to5% beryllium, heating, preferably by rolling out or-hamconsisting in heating the alloys toa temperay mering it. In this way for example degrees ture above 7 00? C., cooling, and afterwards of hardness of 600 Brinell and more were-ob, working them mechanically. I g I served in an alloy"containing about ,2 5. A method for improving the qualities of beryllium. The rolling out of the alloy of a nickel beryllium alloy which contains may follow the first heating. I a large proportion of nickel and up to 5% '95 I Mechanical elongation per se is not absoberyllium, and which may contain quantities" I 45 lutely necessary for the improvement of the' of other metals, consisting-in subjecting the alloys. Cast alloy also can be considerably .alloy toaboveatemperature ofapproximate- I increased in hardness by the above described -1y700 (la-mechanically awor 'ngthe allo temperature treatment. In this case the procafter. it-has'coo1ed andthen. reheatingy t T .1 ...""ess of'improvement can be. modified .in that "to a lowerjt'e I'rature. I I when castingin chills the molten alloy isf ii fi; A =meth for improving the qualities I cooled in the mould instead of being ofa nickel beryllium alloy which contains a I .j quenched. I larg jp qp rtwn t a ckel and up' beryllium, which consists in chill casting and subjecting it to mechanical working, and

reheating it, to a, temperature within the reheating it to a temperature within the ep- 10 approximate range;,pf 300600 C. proximate range of 300 to 600 C.

' 7. Amethod for improving the qualities of In testimony whereof we afiix our signa- 5 a nickel beryllium alloy which contains a tures.

preponderating amount of nickel and up to 5% beryllium, consisting in heating the alloy GEORG MASING. to a temperature above 700 0., quenching it, OTTO DAHL. 

